From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gordan Bobic Subject: Re: Cannot start Fedora 19 HVM domU with VGA passthru Date: Thu, 18 Jul 2013 11:09:32 +0100 Message-ID: References: <51E6B95E.3020500@gmail.com> <20130717215625.GL2924@reaktio.net> <51E7A94E.50005@gmail.com> <6d8cfa90cde86eca5915ff398872b459@mail.shatteredsilicon.net> <51E7BE5F.8000504@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <51E7BE5F.8000504@gmail.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: singapore.mr.teo.en.ming@gmail.com Cc: xen-users@lists.xen.org, xen-devel@lists.xen.org List-Id: xen-devel@lists.xenproject.org On Thu, 18 Jul 2013 18:07:27 +0800, "Singapore Citizen Mr. Teo En Ming (Zhang Enming)" wrote: > On 18/07/2013 16:46, Gordan Bobic wrote: >> On Thu, 18 Jul 2013 16:37:34 +0800, "Singapore Citizen Mr. Teo En >> Ming (Zhang Enming)" wrote: >> >>> Although Fedora 19 HVM domU with VGA passthrough cannot start, >>> Debian >>> 7.1.0 amd64 HVM domU with VGA passthrough can start. In Debian >>> 7.1.0 >>> amd64 HVM domU with VGA passthrough, Intel HD Graphics 4600 is >>> listed >>> in lspci -vvv. Please refer to lspci.txt. It is strange that no >>> kernel >>> module is being loaded for Intel HD Graphics 4600. There is no >>> "Kernel >>> driver in use" statement after VGA compatible controller: Intel >>> Corporation Haswell Integrated Graphics Controller (rev 06) >>> (prog-if >>> 00 [VGA controller]). >>> >>> No kernel driver is seen in lsmod. Please refer to lsmod.txt >>> >>> When I tried to load the kernel module by executing "modprobe >>> i915", >>> it complains "no such device". >>> >>> ERROR: could not insert 'i915': No such device >>> >>> So is my Intel HD Graphics 4600 VGA Passthrough to Debian 7.1.0 >>> amd64 >>> HVM domU considered successful since the i915 driver cannot be >>> loaded? >>> >>> Thank you very much. >> >> If you have a driver in dom0 claiming the device (other than the >> xen-pciback >> driver), you cannot pass through that device. If you do lspci -ccc >> on F19 >> and you see the driver in use for that device being something other >> than >> xen-pciback, that would explain why you can't pass it through. >> >> Also, did you first do xl pci-assignable-add for that device? This >> attempts >> to detach the device from it's current driver but doesn't always >> work >> especially for GPUs. The only solution is blacklist the driver for >> the >> device in dom0. The downside is that you cannot run a GUI in dom0 on >> that >> device. >> >> Gordan >> > Dear Gordan, > > I cannot start Fedora 19 HVM domU with VGA passthrough at all. Could > you advise me on the workaround? > > As for the Intel HD Graphics (i915) driver, I have it blacklisted in > /etc/modprobe.d/blacklist.conf already. Please refer to attached > blacklist.conf. Have you confirm that no other driver is bound to the device in lspci -vvv? Also what version of Xen are you running on each of the distros, and which dom0 kernel? Gordan